power: reset: Skip emmc_dload sysfs entry creation

Do not create /sys/kernel/dload/emmc_dload sysfs entry
when imem-dload-type is not defined and also fix error
paths of sysfs entry creation.

Change-Id: I354e1f7635c5163516e256ed71b8510d1665877d
Signed-off-by: Prasad Sodagudi <psodagud@codeaurora.org>